/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:18:31,993 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:18:32,034 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:18:32,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:18:32,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:18:32,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:18:32,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:18:32,052 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:18:32,052 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:18:32,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:18:32,053 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:18:32,053 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:18:32,053 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:18:32,053 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:18:32,054 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:18:32,054 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:18:32,054 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:18:32,054 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:18:32,054 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:18:32,055 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:18:32,055 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:18:32,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:18:32,056 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:18:32,056 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:18:32,056 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:18:32,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:18:32,056 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:18:32,057 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:18:32,057 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:18:32,057 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:18:32,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:18:32,057 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:18:32,057 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:18:32,058 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:18:32,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:18:32,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:18:32,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:18:32,258 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:18:32,258 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:18:32,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-12-05 21:18:33,330 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:18:33,507 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:18:33,508 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-12-05 21:18:33,525 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf01df700/1929f0b416904a1cab282e6354dbcb58/FLAG04307bf91 [2023-12-05 21:18:33,537 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf01df700/1929f0b416904a1cab282e6354dbcb58 [2023-12-05 21:18:33,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:18:33,540 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:18:33,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:18:33,541 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:18:33,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:18:33,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:18:33" (1/1) ... [2023-12-05 21:18:33,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@452540b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:33, skipping insertion in model container [2023-12-05 21:18:33,545 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:18:33" (1/1) ... [2023-12-05 21:18:33,595 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:18:33,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:18:34,005 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:18:34,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:18:34,112 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:18:34,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34 WrapperNode [2023-12-05 21:18:34,113 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:18:34,114 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:18:34,114 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:18:34,114 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:18:34,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,144 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,181 INFO L138 Inliner]: procedures = 279, calls = 69, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 261 [2023-12-05 21:18:34,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:18:34,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:18:34,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:18:34,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:18:34,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,196 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,196 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,205 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,210 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:18:34,216 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:18:34,216 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:18:34,216 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:18:34,217 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (1/1) ... [2023-12-05 21:18:34,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:18:34,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:34,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:18:34,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:18:34,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:18:34,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-05 21:18:34,359 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-12-05 21:18:34,360 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-12-05 21:18:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:18:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:18:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:18:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-12-05 21:18:34,360 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-12-05 21:18:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:18:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:18:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-05 21:18:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:18:34,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-05 21:18:34,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:18:34,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:18:34,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:18:34,365 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:18:34,531 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:18:34,534 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:18:34,965 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:18:34,994 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:18:34,994 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-12-05 21:18:34,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:18:34 BoogieIcfgContainer [2023-12-05 21:18:34,996 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:18:35,021 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:18:35,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:18:35,024 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:18:35,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:18:33" (1/3) ... [2023-12-05 21:18:35,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a119bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:18:35, skipping insertion in model container [2023-12-05 21:18:35,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:34" (2/3) ... [2023-12-05 21:18:35,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a119bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:18:35, skipping insertion in model container [2023-12-05 21:18:35,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:18:34" (3/3) ... [2023-12-05 21:18:35,026 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2023-12-05 21:18:35,052 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:18:35,053 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-12-05 21:18:35,053 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:18:35,161 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-12-05 21:18:35,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 311 transitions, 642 flow [2023-12-05 21:18:35,325 INFO L124 PetriNetUnfolderBase]: 59/579 cut-off events. [2023-12-05 21:18:35,325 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-12-05 21:18:35,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 579 events. 59/579 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2579 event pairs, 0 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 288. Up to 8 conditions per place. [2023-12-05 21:18:35,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 288 places, 311 transitions, 642 flow [2023-12-05 21:18:35,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 288 places, 311 transitions, 642 flow [2023-12-05 21:18:35,356 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:18:35,360 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69a1b37f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:18:35,360 INFO L363 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-12-05 21:18:35,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:18:35,365 INFO L124 PetriNetUnfolderBase]: 2/49 cut-off events. [2023-12-05 21:18:35,365 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:18:35,365 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:35,366 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:35,366 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:35,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash -355649721, now seen corresponding path program 1 times [2023-12-05 21:18:35,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:35,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692610040] [2023-12-05 21:18:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:35,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:35,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:35,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692610040] [2023-12-05 21:18:35,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692610040] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:35,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:35,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:18:35,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890785362] [2023-12-05 21:18:35,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:35,662 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:18:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:18:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:18:35,685 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 311 [2023-12-05 21:18:35,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 311 transitions, 642 flow. Second operand has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:35,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:35,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 311 [2023-12-05 21:18:35,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:35,992 INFO L124 PetriNetUnfolderBase]: 171/1710 cut-off events. [2023-12-05 21:18:35,993 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-12-05 21:18:36,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2029 conditions, 1710 events. 171/1710 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 12441 event pairs, 110 based on Foata normal form. 307/1699 useless extension candidates. Maximal degree in co-relation 1161. Up to 264 conditions per place. [2023-12-05 21:18:36,010 INFO L140 encePairwiseOnDemand]: 288/311 looper letters, 33 selfloop transitions, 2 changer transitions 0/294 dead transitions. [2023-12-05 21:18:36,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 294 transitions, 678 flow [2023-12-05 21:18:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:18:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:18:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 840 transitions. [2023-12-05 21:18:36,024 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9003215434083601 [2023-12-05 21:18:36,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 840 transitions. [2023-12-05 21:18:36,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 840 transitions. [2023-12-05 21:18:36,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:36,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 840 transitions. [2023-12-05 21:18:36,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,043 INFO L308 CegarLoopForPetriNet]: 288 programPoint places, -1 predicate places. [2023-12-05 21:18:36,043 INFO L500 AbstractCegarLoop]: Abstraction has has 287 places, 294 transitions, 678 flow [2023-12-05 21:18:36,044 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,044 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:36,044 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:36,044 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:18:36,045 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:36,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash 336640463, now seen corresponding path program 1 times [2023-12-05 21:18:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355969514] [2023-12-05 21:18:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:36,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:36,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355969514] [2023-12-05 21:18:36,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355969514] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:36,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:36,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:18:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484268285] [2023-12-05 21:18:36,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:36,235 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:18:36,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:18:36,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:18:36,238 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 311 [2023-12-05 21:18:36,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 294 transitions, 678 flow. Second operand has 6 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:36,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 311 [2023-12-05 21:18:36,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:39,606 INFO L124 PetriNetUnfolderBase]: 8794/25645 cut-off events. [2023-12-05 21:18:39,606 INFO L125 PetriNetUnfolderBase]: For 2704/2908 co-relation queries the response was YES. [2023-12-05 21:18:39,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42135 conditions, 25645 events. 8794/25645 cut-off events. For 2704/2908 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 308772 event pairs, 8290 based on Foata normal form. 0/20114 useless extension candidates. Maximal degree in co-relation 39191. Up to 13442 conditions per place. [2023-12-05 21:18:39,796 INFO L140 encePairwiseOnDemand]: 301/311 looper letters, 77 selfloop transitions, 9 changer transitions 0/294 dead transitions. [2023-12-05 21:18:39,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 294 transitions, 850 flow [2023-12-05 21:18:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:18:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:18:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1522 transitions. [2023-12-05 21:18:39,800 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6991272393201654 [2023-12-05 21:18:39,800 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1522 transitions. [2023-12-05 21:18:39,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1522 transitions. [2023-12-05 21:18:39,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:39,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1522 transitions. [2023-12-05 21:18:39,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 217.42857142857142) internal successors, (1522), 7 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:39,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:39,807 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:39,808 INFO L308 CegarLoopForPetriNet]: 288 programPoint places, 3 predicate places. [2023-12-05 21:18:39,808 INFO L500 AbstractCegarLoop]: Abstraction has has 291 places, 294 transitions, 850 flow [2023-12-05 21:18:39,809 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:39,809 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:39,809 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:39,809 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:18:39,809 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:39,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash 336640464, now seen corresponding path program 1 times [2023-12-05 21:18:39,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:39,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329496238] [2023-12-05 21:18:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:39,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:39,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:39,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329496238] [2023-12-05 21:18:39,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329496238] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:39,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:39,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:18:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72416419] [2023-12-05 21:18:39,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:39,934 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:18:39,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:18:39,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:18:39,936 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 311 [2023-12-05 21:18:39,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 294 transitions, 850 flow. Second operand has 6 states, 6 states have (on average 210.33333333333334) internal successors, (1262), 6 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:39,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:39,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 311 [2023-12-05 21:18:39,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:45,071 INFO L124 PetriNetUnfolderBase]: 16762/44520 cut-off events. [2023-12-05 21:18:45,071 INFO L125 PetriNetUnfolderBase]: For 17121/19777 co-relation queries the response was YES. [2023-12-05 21:18:45,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90402 conditions, 44520 events. 16762/44520 cut-off events. For 17121/19777 co-relation queries the response was YES. Maximal size of possible extension queue 1849. Compared 570647 event pairs, 15948 based on Foata normal form. 0/42353 useless extension candidates. Maximal degree in co-relation 85885. Up to 20969 conditions per place. [2023-12-05 21:18:45,434 INFO L140 encePairwiseOnDemand]: 301/311 looper letters, 73 selfloop transitions, 9 changer transitions 0/292 dead transitions. [2023-12-05 21:18:45,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 292 transitions, 1006 flow [2023-12-05 21:18:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:18:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:18:45,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1538 transitions. [2023-12-05 21:18:45,438 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7064768029398254 [2023-12-05 21:18:45,438 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1538 transitions. [2023-12-05 21:18:45,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1538 transitions. [2023-12-05 21:18:45,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:45,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1538 transitions. [2023-12-05 21:18:45,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 219.71428571428572) internal successors, (1538), 7 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:45,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:45,446 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:45,447 INFO L308 CegarLoopForPetriNet]: 288 programPoint places, 7 predicate places. [2023-12-05 21:18:45,447 INFO L500 AbstractCegarLoop]: Abstraction has has 295 places, 292 transitions, 1006 flow [2023-12-05 21:18:45,448 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.33333333333334) internal successors, (1262), 6 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:45,448 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:45,448 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:45,448 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:18:45,448 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:45,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash -950194077, now seen corresponding path program 1 times [2023-12-05 21:18:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:45,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90745795] [2023-12-05 21:18:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:45,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:45,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:45,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90745795] [2023-12-05 21:18:45,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90745795] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:45,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:45,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:18:45,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89963527] [2023-12-05 21:18:45,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:45,629 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:18:45,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:18:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:18:45,631 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 311 [2023-12-05 21:18:45,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 292 transitions, 1006 flow. Second operand has 6 states, 6 states have (on average 210.66666666666666) internal successors, (1264), 6 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:45,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:45,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 311 [2023-12-05 21:18:45,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:51,833 INFO L124 PetriNetUnfolderBase]: 19474/50592 cut-off events. [2023-12-05 21:18:51,834 INFO L125 PetriNetUnfolderBase]: For 42820/48608 co-relation queries the response was YES. [2023-12-05 21:18:52,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131364 conditions, 50592 events. 19474/50592 cut-off events. For 42820/48608 co-relation queries the response was YES. Maximal size of possible extension queue 1980. Compared 646675 event pairs, 12591 based on Foata normal form. 530/49026 useless extension candidates. Maximal degree in co-relation 125261. Up to 24898 conditions per place. [2023-12-05 21:18:52,495 INFO L140 encePairwiseOnDemand]: 302/311 looper letters, 161 selfloop transitions, 6 changer transitions 0/375 dead transitions. [2023-12-05 21:18:52,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 375 transitions, 1832 flow [2023-12-05 21:18:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:18:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:18:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1208 transitions. [2023-12-05 21:18:52,502 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7768488745980707 [2023-12-05 21:18:52,502 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1208 transitions. [2023-12-05 21:18:52,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1208 transitions. [2023-12-05 21:18:52,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:52,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1208 transitions. [2023-12-05 21:18:52,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.6) internal successors, (1208), 5 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:52,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:52,515 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:52,517 INFO L308 CegarLoopForPetriNet]: 288 programPoint places, 10 predicate places. [2023-12-05 21:18:52,517 INFO L500 AbstractCegarLoop]: Abstraction has has 298 places, 375 transitions, 1832 flow [2023-12-05 21:18:52,517 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.66666666666666) internal successors, (1264), 6 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:52,517 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:52,517 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:52,518 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:18:52,518 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:52,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash -950194076, now seen corresponding path program 1 times [2023-12-05 21:18:52,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:52,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559112031] [2023-12-05 21:18:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:52,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:52,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559112031] [2023-12-05 21:18:52,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559112031] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:52,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:52,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:18:52,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799762526] [2023-12-05 21:18:52,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:52,705 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:18:52,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:18:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:18:52,707 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 311 [2023-12-05 21:18:52,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 375 transitions, 1832 flow. Second operand has 7 states, 7 states have (on average 185.71428571428572) internal successors, (1300), 7 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:52,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:52,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 311 [2023-12-05 21:18:52,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:59,799 INFO L124 PetriNetUnfolderBase]: 22495/54357 cut-off events. [2023-12-05 21:18:59,799 INFO L125 PetriNetUnfolderBase]: For 69373/76689 co-relation queries the response was YES. [2023-12-05 21:18:59,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173839 conditions, 54357 events. 22495/54357 cut-off events. For 69373/76689 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 678340 event pairs, 13819 based on Foata normal form. 6/52967 useless extension candidates. Maximal degree in co-relation 166102. Up to 26221 conditions per place. [2023-12-05 21:19:00,364 INFO L140 encePairwiseOnDemand]: 303/311 looper letters, 201 selfloop transitions, 7 changer transitions 0/389 dead transitions. [2023-12-05 21:19:00,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 389 transitions, 2312 flow [2023-12-05 21:19:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:19:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:19:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1264 transitions. [2023-12-05 21:19:00,369 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.677384780278671 [2023-12-05 21:19:00,369 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1264 transitions. [2023-12-05 21:19:00,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1264 transitions. [2023-12-05 21:19:00,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:00,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1264 transitions. [2023-12-05 21:19:00,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 210.66666666666666) internal successors, (1264), 6 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:00,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 311.0) internal successors, (2177), 7 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:00,375 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 311.0) internal successors, (2177), 7 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:00,377 INFO L308 CegarLoopForPetriNet]: 288 programPoint places, 15 predicate places. [2023-12-05 21:19:00,377 INFO L500 AbstractCegarLoop]: Abstraction has has 303 places, 389 transitions, 2312 flow [2023-12-05 21:19:00,377 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 185.71428571428572) internal successors, (1300), 7 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:00,378 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:00,378 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:00,378 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:19:00,378 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:19:00,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1477662714, now seen corresponding path program 1 times [2023-12-05 21:19:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:00,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466983092] [2023-12-05 21:19:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:00,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:00,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:00,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466983092] [2023-12-05 21:19:00,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466983092] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:19:00,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948356261] [2023-12-05 21:19:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:00,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:19:00,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:19:00,486 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:19:00,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:19:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:00,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:19:00,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:19:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:00,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:19:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:00,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948356261] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:19:00,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:19:00,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:19:00,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511830199] [2023-12-05 21:19:00,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:19:00,718 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:19:00,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:00,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:19:00,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:19:00,721 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 311 [2023-12-05 21:19:00,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 389 transitions, 2312 flow. Second operand has 10 states, 10 states have (on average 262.4) internal successors, (2624), 10 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:00,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:00,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 311 [2023-12-05 21:19:00,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:08,077 INFO L124 PetriNetUnfolderBase]: 22495/54376 cut-off events. [2023-12-05 21:19:08,077 INFO L125 PetriNetUnfolderBase]: For 91480/98946 co-relation queries the response was YES. [2023-12-05 21:19:08,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180426 conditions, 54376 events. 22495/54376 cut-off events. For 91480/98946 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 678110 event pairs, 13819 based on Foata normal form. 0/52980 useless extension candidates. Maximal degree in co-relation 172273. Up to 26221 conditions per place. [2023-12-05 21:19:08,719 INFO L140 encePairwiseOnDemand]: 305/311 looper letters, 60 selfloop transitions, 9 changer transitions 0/398 dead transitions. [2023-12-05 21:19:08,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 398 transitions, 2506 flow [2023-12-05 21:19:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:19:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:19:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2386 transitions. [2023-12-05 21:19:08,723 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8524473026080743 [2023-12-05 21:19:08,723 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2386 transitions. [2023-12-05 21:19:08,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2386 transitions. [2023-12-05 21:19:08,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:08,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2386 transitions. [2023-12-05 21:19:08,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 265.1111111111111) internal successors, (2386), 9 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:08,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 311.0) internal successors, (3110), 10 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:08,732 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 311.0) internal successors, (3110), 10 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:08,732 INFO L308 CegarLoopForPetriNet]: 288 programPoint places, 23 predicate places. [2023-12-05 21:19:08,732 INFO L500 AbstractCegarLoop]: Abstraction has has 311 places, 398 transitions, 2506 flow [2023-12-05 21:19:08,733 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 262.4) internal successors, (2624), 10 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:08,733 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:08,733 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:08,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-05 21:19:08,939 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-05 21:19:08,939 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:19:08,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2136363278, now seen corresponding path program 1 times [2023-12-05 21:19:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:08,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124165949] [2023-12-05 21:19:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:08,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:09,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:09,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124165949] [2023-12-05 21:19:09,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124165949] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:19:09,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241321925] [2023-12-05 21:19:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:09,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:19:09,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:19:09,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:19:09,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:19:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:09,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-05 21:19:09,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:19:09,543 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-05 21:19:09,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-05 21:19:09,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:19:09,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:19:09,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:19:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:09,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:19:10,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-05 21:19:10,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-12-05 21:19:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:10,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241321925] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:19:10,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:19:10,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 27 [2023-12-05 21:19:10,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770627678] [2023-12-05 21:19:10,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:19:10,469 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-05 21:19:10,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:10,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-05 21:19:10,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2023-12-05 21:19:10,473 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 311 [2023-12-05 21:19:10,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 398 transitions, 2506 flow. Second operand has 28 states, 28 states have (on average 182.57142857142858) internal successors, (5112), 28 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:10,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:10,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 311 [2023-12-05 21:19:10,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:19,058 INFO L124 PetriNetUnfolderBase]: 22495/54387 cut-off events. [2023-12-05 21:19:19,059 INFO L125 PetriNetUnfolderBase]: For 124189/135970 co-relation queries the response was YES. [2023-12-05 21:19:19,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215447 conditions, 54387 events. 22495/54387 cut-off events. For 124189/135970 co-relation queries the response was YES. Maximal size of possible extension queue 2229. Compared 678633 event pairs, 13819 based on Foata normal form. 7/52998 useless extension candidates. Maximal degree in co-relation 205794. Up to 26221 conditions per place. [2023-12-05 21:19:19,706 INFO L140 encePairwiseOnDemand]: 297/311 looper letters, 223 selfloop transitions, 18 changer transitions 0/418 dead transitions. [2023-12-05 21:19:19,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 418 transitions, 3152 flow [2023-12-05 21:19:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-05 21:19:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-12-05 21:19:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3064 transitions. [2023-12-05 21:19:19,712 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6157556270096463 [2023-12-05 21:19:19,712 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3064 transitions. [2023-12-05 21:19:19,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3064 transitions. [2023-12-05 21:19:19,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:19,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3064 transitions. [2023-12-05 21:19:19,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 191.5) internal successors, (3064), 16 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:19,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 311.0) internal successors, (5287), 17 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:19,735 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 311.0) internal successors, (5287), 17 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:19,736 INFO L308 CegarLoopForPetriNet]: 288 programPoint places, 38 predicate places. [2023-12-05 21:19:19,736 INFO L500 AbstractCegarLoop]: Abstraction has has 326 places, 418 transitions, 3152 flow [2023-12-05 21:19:19,738 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 182.57142857142858) internal successors, (5112), 28 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:19,738 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:19,738 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:19,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-05 21:19:19,943 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-05 21:19:19,943 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:19:19,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash 402435422, now seen corresponding path program 2 times [2023-12-05 21:19:19,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:19,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026328532] [2023-12-05 21:19:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:20,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:20,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026328532] [2023-12-05 21:19:20,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026328532] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:19:20,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662367157] [2023-12-05 21:19:20,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:19:20,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:19:20,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:19:20,139 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:19:20,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-05 21:19:20,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:19:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:19:20,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-05 21:19:20,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:19:20,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:19:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-05 21:19:20,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:19:20,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662367157] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:19:20,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:19:20,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-12-05 21:19:20,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094196854] [2023-12-05 21:19:20,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:19:20,274 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:19:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:19:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:19:20,275 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 311 [2023-12-05 21:19:20,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 418 transitions, 3152 flow. Second operand has 4 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:20,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:20,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 311 [2023-12-05 21:19:20,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:30,065 INFO L124 PetriNetUnfolderBase]: 24701/56304 cut-off events. [2023-12-05 21:19:30,066 INFO L125 PetriNetUnfolderBase]: For 190726/212533 co-relation queries the response was YES. [2023-12-05 21:19:30,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256999 conditions, 56304 events. 24701/56304 cut-off events. For 190726/212533 co-relation queries the response was YES. Maximal size of possible extension queue 2292. Compared 666713 event pairs, 14007 based on Foata normal form. 1/54526 useless extension candidates. Maximal degree in co-relation 248876. Up to 28834 conditions per place. [2023-12-05 21:19:30,698 INFO L140 encePairwiseOnDemand]: 304/311 looper letters, 251 selfloop transitions, 8 changer transitions 0/514 dead transitions. [2023-12-05 21:19:30,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 514 transitions, 4809 flow [2023-12-05 21:19:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:19:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:19:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 966 transitions. [2023-12-05 21:19:30,703 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7765273311897106 [2023-12-05 21:19:30,703 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 966 transitions. [2023-12-05 21:19:30,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 966 transitions. [2023-12-05 21:19:30,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:30,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 966 transitions. [2023-12-05 21:19:30,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 241.5) internal successors, (966), 4 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:30,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:30,706 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:30,708 INFO L308 CegarLoopForPetriNet]: 288 programPoint places, 41 predicate places. [2023-12-05 21:19:30,708 INFO L500 AbstractCegarLoop]: Abstraction has has 329 places, 514 transitions, 4809 flow [2023-12-05 21:19:30,708 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:30,708 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:30,708 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:30,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-05 21:19:30,914 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:19:30,914 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:19:30,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash 402435421, now seen corresponding path program 1 times [2023-12-05 21:19:30,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:30,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324194189] [2023-12-05 21:19:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:30,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-05 21:19:30,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:30,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324194189] [2023-12-05 21:19:30,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324194189] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:19:30,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:19:30,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:19:30,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598375828] [2023-12-05 21:19:30,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:19:30,979 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:19:30,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:30,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:19:30,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:19:30,980 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 311 [2023-12-05 21:19:30,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 514 transitions, 4809 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:30,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:30,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 311 [2023-12-05 21:19:30,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:39,843 INFO L124 PetriNetUnfolderBase]: 23783/54417 cut-off events. [2023-12-05 21:19:39,844 INFO L125 PetriNetUnfolderBase]: For 240572/262162 co-relation queries the response was YES. [2023-12-05 21:19:40,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273272 conditions, 54417 events. 23783/54417 cut-off events. For 240572/262162 co-relation queries the response was YES. Maximal size of possible extension queue 2169. Compared 642056 event pairs, 12837 based on Foata normal form. 783/53542 useless extension candidates. Maximal degree in co-relation 264678. Up to 27189 conditions per place. [2023-12-05 21:19:40,466 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 231 selfloop transitions, 3 changer transitions 0/509 dead transitions. [2023-12-05 21:19:40,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 509 transitions, 5217 flow [2023-12-05 21:19:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:19:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:19:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2023-12-05 21:19:40,468 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8038585209003215 [2023-12-05 21:19:40,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2023-12-05 21:19:40,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2023-12-05 21:19:40,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:40,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2023-12-05 21:19:40,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:40,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:40,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:40,471 INFO L308 CegarLoopForPetriNet]: 288 programPoint places, 41 predicate places. [2023-12-05 21:19:40,471 INFO L500 AbstractCegarLoop]: Abstraction has has 329 places, 509 transitions, 5217 flow [2023-12-05 21:19:40,471 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:40,471 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:40,471 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:40,472 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:19:40,472 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:19:40,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash 15865870, now seen corresponding path program 2 times [2023-12-05 21:19:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:40,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076301443] [2023-12-05 21:19:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:41,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:41,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076301443] [2023-12-05 21:19:41,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076301443] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:19:41,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29910964] [2023-12-05 21:19:41,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:19:41,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:19:41,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:19:41,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:19:41,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-05 21:19:41,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:19:41,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:19:41,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-05 21:19:41,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:19:41,681 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-05 21:19:41,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-05 21:19:41,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:19:41,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:19:41,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:19:42,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:19:42,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:19:42,340 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-05 21:19:42,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-05 21:19:42,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:19:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:42,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:19:42,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-05 21:19:42,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-12-05 21:19:43,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-05 21:19:43,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-12-05 21:19:43,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-05 21:19:43,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-12-05 21:19:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:44,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29910964] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:19:44,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:19:44,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 14] total 51 [2023-12-05 21:19:44,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435948441] [2023-12-05 21:19:44,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:19:44,170 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-05 21:19:44,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:44,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-05 21:19:44,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2023-12-05 21:19:44,176 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 311 [2023-12-05 21:19:44,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 509 transitions, 5217 flow. Second operand has 52 states, 52 states have (on average 182.53846153846155) internal successors, (9492), 52 states have internal predecessors, (9492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:44,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:44,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 311 [2023-12-05 21:19:44,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand